TW201818683A - Cross-carrier scheduling method and device - Google Patents

Abstract

The present invention provides a cross-carrier scheduling method and device. The cross-carrier scheduling method comprises: receiving, under a first carrier, a cross-carrier scheduling indication sent by a base station; determining a cross-carrier scheduling time indicated by the base station according to the cross-carrier scheduling indication; adding a delay time to the cross-carrier scheduling time to obtain an actual cross-carrier scheduling time; and performing communication between user equipment by using a second carrier within the actual cross-carrier scheduling time.

Description

   Cross-carrier scheduling method and device   

The present invention belongs to the field of communication technology, and particularly relates to a cross-carrier scheduling method and device.

In the adopted standards of the connected car system, the content of the new downlink control information DCI field is shown in Table 1, where u is the number of corresponding sub-channels under different bandwidth conditions:     

In order to be compatible with all standards, the DCI in the Internet of Vehicles needs to ensure the same length as the previous DCI format 0 / 1A. Therefore, zero padding is needed on the DCI of the connected car to ensure the same length. If you need these zero paddings for other purposes in the future, you can replace the zero bits with other information fields.

For a full-duplex communication technology used in a mobile communication system, in the time division duplex TDD mode, when the user equipment UE detects the physical downlink control channel PDCCH / enhanced physical downlink control channel EPDCCH in the sub-frame n, it will Adjust the k sub-frames backward for cross-carrier communication, that is, the n + k sub-frames. For the value of k, refer to the following table 2 (k value of TDD configuration 0-6):     

Combining the configurations in Table 3 (TDD uplink and downlink configuration table) and the transmission sub-frame analysis of all TDD uplink and downlink configurations 0-6, as shown in Figure 1, the cellular network Uu is dedicated to wisdom on sidelink for cross-carrier scheduling When the PC5 sub-frame of the transportation system ITS, the user can only schedule to the PC5 sub-frame V corresponding to the uplink sub-frame U through the downlink sub-frame D and the special sub-frame S, but not to each downlink sub-frame. The PC5 sub-frame V corresponding to the special sub-frame (such as the sub-frame V with a striped background in FIG. 1), thus causing a waste of resources of the molecular frame in the upper part of the time domain.

An object of the present invention is to provide a cross-carrier scheduling method and device, which are used to solve the problem of resource waste of the upper molecular frame in the time domain in the existing cross-carrier scheduling.

To achieve the above object, an embodiment of the present invention provides a cross-carrier scheduling method, including: receiving a cross-carrier scheduling instruction sent by a base station under a first carrier; and determining the cross-carrier scheduling time indicated by the base station according to the cross-carrier scheduling instruction. ; Increase the delay time on the cross-carrier scheduling time to obtain the actual cross-carrier scheduling time; within the actual cross-carrier scheduling time, use the second carrier for communication between user equipments.

Wherein, before adding the delay time to the cross-carrier scheduling time to obtain the actual cross-carrier scheduling time, the method includes: according to the cross-carrier scheduling instruction for transmitting the sub-frame number and transmission sub-frame structure to obtain the instruction of the base station. The next cross-carrier scheduling time of the; determining the value of the delay time according to the time interval between the cross-carrier scheduling time and the next cross-carrier scheduling time.

The step of receiving the cross-carrier scheduling instruction sent by the base station on the first carrier includes: receiving, on the first carrier, downlink control information DCI transmitted through the physical downlink control channel PDCCH / enhanced physical downlink control channel EPDCCH; obtaining The cross-carrier scheduling indication carried in the DCI, wherein the cross-carrier scheduling indication occupies at least 2 bits in the DCI.

The step of receiving downlink control information DCI transmitted in the physical downlink control channel PDCCH / enhanced physical downlink control channel EPDCCH under the first carrier includes receiving all downlink sub-frames and special sub-messages under the first carrier. Block DCI transmitted by PDCCH / EPDCCH.

The length of the DCI is determined based on the sum of the length of the basic information bit and the preset scheduling bit length under the maximum bandwidth, and the maximum value of the maximum format length under the current bandwidth. Among them, the basic information bit The length is equal to the length of DCI format 5A, the maximum format length is equal to the length of DCI format 0, and the preset scheduling bit length includes a 3-bit semi-persistent scheduling SPS configuration instruction and a 1-bit SPS start / release instruction.

To achieve the above object, an embodiment of the present invention further provides a cross-carrier scheduling device, including a transceiver, a processor, and a memory for storing programs or data used by the processor when performing operations, wherein: the transceiver Machine for receiving the cross-carrier scheduling instruction sent by the base station under the first carrier; the processor is configured to determine the cross-carrier scheduling time indicated by the base station according to the cross-carrier scheduling instruction received by the transceiver, and The delay time is added to the scheduling time to obtain the actual cross-carrier scheduling time; the transceiver is further configured to use the second carrier to perform communication between user equipments within the actual cross-carrier scheduling time obtained by the processor.

The processor is further configured to: obtain the next cross-carrier scheduling time indicated by the base station at the sub-frame number and transmission sub-frame structure used for transmission according to the cross-carrier scheduling instruction; and according to the cross-carrier scheduling time Determine the value of the delay time with the time interval of the next cross-carrier scheduling time.

The transceiver is specifically configured to receive downlink control information DCI transmitted through the physical downlink control channel PDCCH / enhanced physical downlink control channel EPDCCH under the first carrier, and obtain a cross-carrier scheduling instruction carried in the DCI, where the The cross-carrier scheduling indication occupies at least 2 bits in the DCI.

The transceiver is specifically configured to receive all downlink subframes and special subframes transmitted through the PDCCH / EPDCCH under the first carrier.

The length of the DCI is determined based on the sum of the length of the basic information bit and the preset scheduling bit length under the maximum bandwidth, and the maximum value of the maximum format length under the current bandwidth. Among them, the basic information bit The length is equal to the length of DCI format 5A, the maximum format length is equal to the length of DCI format 0, and the preset scheduling bit length includes a 3-bit semi-persistent scheduling SPS configuration instruction and a 1-bit SPS start / release instruction.

The beneficial effects of the foregoing technical solution of the present invention are as follows: In the cross-carrier scheduling method according to the embodiment of the present invention, after receiving a cross-carrier scheduling instruction sent by a base station under a first carrier, the user equipment determines according to the cross-carrier scheduling instruction. The cross-carrier scheduling time indicated by the base station, and then a delay time is added to the cross-carrier scheduling time indicated by the base station to obtain the actual cross-carrier scheduling time. Finally, within the actual cross-carrier scheduling time, the second carrier is used for user equipment. Intercommunication. By increasing a delay time, the cross-carrier scheduling time indicated by the base station is compensated, the length of the scheduling time is enlarged, and the resource utilization rate of the system is improved.

101-106, 1011-1012, 201-207‧‧‧ steps

1001‧‧‧Receiving module

1002‧‧‧First Confirmation Module

1003‧‧‧First Processing Module

1004‧‧‧Communication Module

1100‧‧‧ processor

1110‧‧‧ Transceiver

1120‧‧‧Memory

1130‧‧‧user interface

In order to explain the technical solution of the embodiments of the present invention more clearly, the drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings in the following description are just some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without paying creative labor.

FIG. 1 is a schematic diagram of the existing scheduling of the TDD configuration 0 transmission sub-frame structure; FIG. 2 is a schematic flowchart of the steps of the cross-carrier scheduling method according to the first embodiment of the present invention; and FIG. 3 is a cross-carrier scheduling method according to the first embodiment of the present invention. Schematic diagram 1 of specific steps; FIG. 4 is a schematic diagram of scheduling implemented by the TDD configuration 0 transmission sub-frame structure using the first embodiment of the cross-carrier scheduling method of the present invention; FIG. 5 is a specific example of the cross-carrier scheduling method of the first embodiment of the present invention Schematic diagram of steps 2; FIG. 6 is a schematic flowchart of steps of the cross-carrier scheduling method according to the second embodiment of the present invention; FIG. 7 is a schedule realized by applying the cross-carrier scheduling method of the first embodiment of the present invention to a TDD configuration 5 transmission sub-frame structure Schematic diagram 1; FIG. 8 is a schematic diagram of a scheduling scheme implemented by the cross-carrier scheduling method according to the first embodiment of the present invention with a TDD configuration 5 transmission sub-frame structure; 10 is a schematic structural diagram of a cross-carrier scheduling apparatus according to a third embodiment of the present invention; and FIG. 11 is a cross-carrier scheduling apparatus according to a fourth embodiment of the present invention. Configuration of FIG.

In the following, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

First embodiment

As shown in FIG. 2, a cross-carrier scheduling method according to a first embodiment of the present invention includes: Step 101: Receive a cross-carrier scheduling instruction sent by a base station under a first carrier; and Step 102: determine according to the cross-carrier scheduling instruction. The cross-carrier scheduling time indicated by the base station; step 103, adding a delay time to the cross-carrier scheduling time to obtain the actual cross-carrier scheduling time; step 104, using the second carrier to perform user-to-user communication within the actual cross-carrier scheduling time. Communication.

Through steps 101 to 104, the user equipment UE (also referred to as a "terminal") receives the cross-carrier scheduling instruction sent by the eNB under the first carrier that communicates with the base station eNB, and then determines according to the cross-carrier scheduling instruction After the cross-carrier scheduling time indicated by the eNB, a delay time is added to the cross-carrier scheduling time to obtain the actual cross-carrier scheduling time. Finally, the UE uses the communication time with other UEs within the actual cross-carrier scheduling time. The second carrier communicates. In this way, by adding a delay time to the cross-carrier scheduling time to compensate, the length of the scheduling time is enlarged, thereby improving the resource utilization rate of the system.

Taking TDD for communication between the UE and the eNB as an example, the UE receives the cross-carrier scheduling instruction under the Uu carrier, and after obtaining the actual cross-carrier scheduling time, the actual cross-carrier scheduling time is completed through the resources of the PC5 carrier dedicated to the ITS. Communication between UE and UE.

Specifically, as shown in FIG. 3, step 101 includes: step 1011, receiving downlink control information DCI transmitted through the physical downlink control channel PDCCH / enhanced physical downlink control channel EPDCCH under the first carrier; step 1012, obtaining the DCI carried in the DCI The cross-carrier scheduling instruction in the method, wherein the cross-carrier scheduling instruction occupies at least 2 bits in the DCI.

It can be known from this that, in this embodiment, the cross-carrier scheduling instruction is carried in the DCI, that is, the cross-carrier scheduling instruction occupies at least 2 bits in the DCI. The DCI is often carried by the PDCCH / EPDCCH. Therefore, in steps 1011 and 1012, the DCI transmitted by the PDCCH / EPDCCH is received on the first carrier, and a cross-carrier scheduling indication is obtained from the DCI.

Still taking TDD for communication between the UE and the eNB as an example, as shown in Table 2, the current TDD configuration (TDD configuration 0-6), according to the received cross-carrier scheduling instruction, can further determine the indication of the base station Cross-carrier scheduling time. If the current TDD configuration is 0, combined with Table 2 and Table 3, the transmission sub-frame structure is shown as "DSUUUDSUUU" in Figure 1. When the received cross-carrier scheduling instruction is a downlink sub-frame with sub-frame number n = 0 In frame D, k = 4 sub-frames are adjusted backward, that is, the position of the sub-frame indicated by arrow l = 4, and it can be determined that the cross-carrier scheduling time indicated by the base station is to adjust k sub-frames backward.

After the cross-carrier scheduling time is determined, as shown in FIG. 2, a delay time is added to the cross-carrier scheduling time to obtain the actual cross-carrier scheduling time.

In the above, the cross-carrier scheduling indication occupies at least 2 bits in the DCI, and through its corresponding value, m sub-frames can be added on the basis of adjusting the k sub-frames, that is, the UE is in the Uu sub-frame. The PC5 sub-frame corresponding to the frame n + k + m performs communication with other UEs. If the cross-carrier scheduling instruction occupies 2 bits in DCI, the value range of m is [0, 3], as shown in Table 4 below; if the cross-carrier scheduling instruction occupies 3 bits in DCI, the value range of m is [0, 7]. ].

It should be understood that, in this embodiment, the downlink sub-frame and the special sub-frame in the Uu sub-frame are not both equipped with the cross-carrier scheduling function, so it can be scheduled that the cross-carrier scheduling instruction occupies 4 bits in the DCI, and accordingly, The value range of m is [0,15]. In this way, when m takes the maximum value, the downlink sub-frame D and the special sub-frame S with the cross-carrier scheduling function in the Uu sub-frame schedule all the PC5 sub-frames.

However, due to the transmission subframe structure of the UE and the eNB, the time interval between two consecutive cross-carrier scheduling times indicated by the base station cannot reach some of the larger values of m, as indicated by the continuous solid arrows in FIG. 4 There are only two sub-frames between PC5 sub-frames. Therefore, as shown in FIG. 5, on the basis of the above embodiment, before step 103, the method further includes: step 105. According to the cross-carrier scheduling instruction transmission, a sub frame number and a transmission sub frame structure are obtained to obtain the base station location. The next scheduled cross-carrier scheduling time; step 106, determine the value of the delay time according to the time interval between the cross-carrier scheduling time and the next cross-carrier scheduling time.

Through steps 105 and 106, first, based on the sub-frame number and transmission sub-frame structure used for the cross-carrier scheduling instruction transmission received in step 101, the next cross-carrier scheduling time indicated by the base station is obtained. The time interval determines the value of the delay time to achieve the best use of system resources.

Continuing the above example, when the currently received cross-carrier scheduling instruction is the downlink sub-frame D with the sub-frame number n = 0, it is determined that the cross-carrier scheduling time indicated by the base station is adjusted backward k = 4 sub-frames, that is, The position of the sub-frame pointed by the arrow at l = 4. Then, according to the transmission sub-frame structure shown in FIG. 4, the next received cross-carrier scheduling instruction is in the special sub-frame S with the sub-frame number n = 1, and it is determined that the cross-carrier scheduling time indicated by the base station is adjusted backwards. k = 6 sub-frames, which is the position of the sub-frame pointed by the arrow at l = 7. The interval between two cross-carrier scheduling times is only two sub-frames. The maximum value of m is 2 and the value is [0, 2]. In this way, when the currently received cross-carrier scheduling instruction is in the downlink sub-frame D with the sub-frame number n = 0, the UE will be at the PC5 sub-frame at n + k + m = 0 + 4 + m, that is, at l = 4. In addition to the use of PC5 resources for communication with other UEs in the frame, PC5 resources can be used for communication with other UEs in the PC5 sub-frames of l = 5, l = 6, which avoids m when the m is limited to the maximum value. Repeat.

In addition, in this embodiment, the length of the DCI is determined based on the sum of the basic information bit length and the preset scheduling bit length under the maximum bandwidth, and the maximum value among the maximum format lengths under the current bandwidth; where, the The basic information bit length is equal to the length of DCI format 5A, and the maximum format length is equal to the length of DCI format 0. The preset scheduling bit length includes a 3-bit semi-persistent scheduling SPS configuration instruction and a 1-bit SPS start / release instruction.

As shown in Table 5 below, the determination of the DCI length applicable to the 1.4MHz bandwidth. According to the above, first determine the basic information bit length (the length of the DCI format 5A) at a maximum bandwidth of 20MHz as 20bit, and the preset scheduling bit The length (3bit semi-persistent scheduling SPS configuration indication and 1bit SPS start / release indication) is 4bit, and the sum is 24bit, and the maximum format length (length of DCI format 0) of 1.4MHz bandwidth is 21bit, whichever is the largest The value is 24bit.

In summary, in the cross-carrier scheduling method according to the first embodiment of the present invention, after receiving the cross-carrier scheduling instruction sent by the eNB under the first carrier, the UE will determine the cross-carrier scheduling indicated by the base station according to the cross-carrier scheduling instruction. Time, and then add a delay time to the cross-carrier scheduling time indicated by the eNB to obtain the actual cross-carrier scheduling time, and finally use the second carrier for communication between user equipments within the actual cross-carrier scheduling time. By increasing a delay time, the cross-carrier scheduling time indicated by the eNB is compensated, the length of the scheduling time is enlarged, and idle resources are effectively used, thereby improving the resource utilization rate of the system. Of course, the cross-carrier scheduling method in this embodiment can also be used in the FDD mode, and details are not described herein again.

Second embodiment

As shown in FIG. 6, the cross-carrier scheduling method according to the second embodiment of the present invention includes: Step 201, receiving all downlink sub-frames and special sub-frames through the PDCCH / EPDCCH under the first carrier; step 202 To obtain a cross-carrier scheduling instruction carried in the DCI, wherein the cross-carrier scheduling instruction occupies at least 2 bits in the DCI; step 203: determine the cross-carrier scheduling time indicated by the base station according to the cross-carrier scheduling instruction; In step 204, the delay time is added to the cross-carrier scheduling time to obtain the actual cross-carrier scheduling time. In step 205, the second carrier is used for communication between user equipments within the actual cross-carrier scheduling time.

In this embodiment, all downlink sub-frames and special sub-frames are given a cross-carrier scheduling capability. Therefore, through steps 201 to 205, the UE and the eNB communicate through the first carrier, and can receive all downlinks under the first carrier. The DCI transmitted by the subframe and the special subframe through the PDCCH / EPDCCH, and obtains the cross-carrier scheduling instruction carried in the DCI, and then, according to the cross-carrier scheduling instruction, determines the cross-carrier scheduling time indicated by the eNB, and thereafter, The delay time is added to the cross-carrier scheduling time to obtain the actual cross-carrier scheduling time. Finally, the UE uses the second carrier that communicates with other UEs to communicate during the actual cross-carrier scheduling time. In this way, by adding a delay time to the cross-carrier scheduling time to compensate, the length of the scheduling time is enlarged, thereby improving the resource utilization rate of the system.

Similarly, using TDD for communication between the UE and the eNB as an example, the UE receives the cross-carrier scheduling instruction under the Uu carrier, obtains the actual cross-carrier scheduling time, and passes the resources of the PC5 carrier dedicated to the ITS at the actual cross-carrier scheduling time. Complete communication between UE and UE. As indicated by the dotted arrow in FIG. 7, the downlink sub-frame and special sub-frame of the Uu sub-frame of TDD setting 5 can perform cross-carrier scheduling at the corresponding sub-frame position on PC5.

In this embodiment, the cross-carrier scheduling specified in the standard must occur 4 ms after the DCI sends a sub-frame. The received cross-carrier scheduling indication is no longer determined by Table 2 to determine the cross-carrier scheduling time indicated by the base station. The cross-carrier scheduling time indicated by the base station corresponding to each cross-carrier scheduling instruction is a fixed value, which is equal to the basic delay of the cross-carrier scheduling is 4 sub-frames, that is, k is fixed at 4, as indicated by the dotted arrow in FIG. 7.

After determining the cross-carrier scheduling time, as shown in FIG. 6, in the next step, a delay time is added to the cross-carrier scheduling time to obtain the actual cross-carrier scheduling time.

As in the first embodiment, the cross-carrier scheduling indication occupies at least 2 bits in the DCI. At this time, through the value of this bit, m sub-frames can be added after adjusting the four sub-frames, that is, the UE performs the PC5 sub-frame corresponding to the Uu sub-frame n + 4 + m. Communication with other UEs. If the cross-carrier scheduling instruction occupies 2 bits in the DCI, the value range of m is [0, 3], and if the cross-carrier scheduling instruction occupies 3 bits in the DCI, the value range of m is [0, 7].

In this embodiment, it may be predetermined that the cross-carrier scheduling indication occupies 2 bits in the DCI, and accordingly, the value range of m is [0, 3]. In this way, as shown in FIG. 8, the scheduling range of Uu sub-frame 0 is PC5 sub-frame 4-sub-frame 7, as indicated by the dotted arrows in the figure. Each Uu downlink sub-frame D and special sub-frame S have this capability, so Uu can successfully cover all PC5 sub-frames during cross-carrier scheduling.

Similarly, due to the transmission subframe structure of the UE and the eNB, the time interval between two consecutive cross-carrier scheduling times indicated by the base station cannot reach a larger value of m, as shown in FIG. The position of the PC5 sub-frame indicated by the arrow, there is no space between the sub-frames. Therefore, as shown in FIG. 9, on the basis of the above embodiment, before step 204, the method further includes: step 206. According to the cross-carrier scheduling instruction transmission, a sub frame number and a transmission sub frame structure are obtained to obtain the base station location. The next scheduled cross-carrier scheduling time. Step 207: Determine the value of the delay time according to the time interval between the cross-carrier scheduling time and the next cross-carrier scheduling time.

Through steps 206 and 207, first, based on the sub-frame number and transmission sub-frame structure used for the cross-carrier scheduling indication transmission received in step 202, the next cross-carrier scheduling time indicated by the base station is obtained, and then, the two The time interval determines the value of the delay time to achieve the best use of system resources.

Continuing the above example, when the currently received cross-carrier scheduling instruction is the downlink sub-frame D with the sub-frame number n = 0, it is determined that the cross-carrier scheduling time indicated by the base station is adjusted backward k = 4 sub-frames, that is, The position of the sub-frame pointed by the arrow at l = 4. Then, according to the transmission sub-frame structure shown in FIG. 7, the next received cross-carrier scheduling instruction is in the special sub-frame S with the sub-frame number n = 1, and it is determined that the cross-carrier scheduling time indicated by the base station is adjusted backwards. k = 4 sub-frames, which is the position of the sub-frame pointed by the arrow at l = 5. There is no interval sub-frame in two cross-carrier scheduling times. The maximum value of m is 0 and the value is 0. In this way, when the currently received cross-carrier scheduling instruction is in the downlink sub-frame D with the sub-frame number n = 0, the UE will be at the PC5 sub-frame at n + k + m = 0 + 4 + 0, that is, at l = 4. The PC5 resource is used for communication with other UEs when the frame is used, and the PC5 resource is used for communication with other UEs according to the next cross-carrier scheduling instruction when the PC5 sub-frame of l = 5. Avoid duplicate processing.

In summary, the cross-carrier scheduling method according to the second embodiment of the present invention is that the UE and the eNB communicate through the first carrier, and can receive all downlink subframes and special subframes transmitted through the PDCCH / EPDCCH under the first carrier. And obtain the cross-carrier scheduling instruction carried in the DCI, and then, according to the cross-carrier scheduling instruction, determine the cross-carrier scheduling time indicated by the eNB, and then add a delay time to the cross-carrier scheduling time to obtain the actual Cross-carrier scheduling time. Finally, the UE uses the second carrier that communicates with other UEs to communicate during the actual cross-carrier scheduling time. In this way, by adding a delay time to the cross-carrier scheduling time for compensation, the length of the scheduling time is extended, and idle resources are effectively used, thereby improving the resource utilization rate of the system. Of course, the cross-carrier scheduling method in this embodiment can also be used in the FDD mode, and details are not described herein again.

Third embodiment

As shown in FIG. 10, a cross-carrier scheduling apparatus according to a third embodiment of the present invention includes: a receiving module 1001, configured to receive a cross-carrier scheduling instruction sent by a base station under a first carrier; a first determining module 1002, According to the cross-carrier scheduling instruction, the cross-carrier scheduling time indicated by the base station is determined. The first processing module 1003 adds delay time to the cross-carrier scheduling time to obtain the actual cross-carrier scheduling time. The communication module 1004 is used for During the actual cross-carrier scheduling time, the second carrier is used for communication between user equipments.

The cross-carrier scheduling device further includes a second processing module configured to obtain the next cross-carrier scheduling indicated by the base station at the sub-frame number and the transmission sub-frame structure used for transmission according to the cross-carrier scheduling instruction. Time; a second determining module, configured to determine the value of the delay time according to the time interval between the cross-carrier scheduling time and the next cross-carrier scheduling time.

The receiving module includes: a receiving sub-module for receiving downlink control information DCI transmitted through a physical downlink control channel PDCCH / enhanced physical downlink control channel EPDCCH under a first carrier; an acquisition sub-module for acquiring The cross-carrier scheduling indication carried in the DCI, wherein the cross-carrier scheduling indication occupies at least 2 bits in the DCI.

The receiving sub-module includes a receiving unit configured to receive all downlink sub-frames and special sub-frames for DCI transmitted through the PDCCH / EPDCCH under the first carrier.

In the cross-carrier scheduling apparatus according to the first embodiment of the present invention, after receiving a cross-carrier scheduling instruction sent by an eNB under the first carrier, the UE will determine the cross-carrier scheduling time indicated by the base station according to the cross-carrier scheduling instruction, and then the eNB will A delay time is added to the indicated cross-carrier scheduling time to obtain the actual cross-carrier scheduling time. Finally, the second carrier is used for communication between user equipments within the actual cross-carrier scheduling time. By increasing a delay time, the cross-carrier scheduling time indicated by the eNB is compensated, the length of the scheduling time is enlarged, and idle resources are effectively used, thereby improving the resource utilization rate of the system.

It should be noted that the cross-carrier scheduling apparatus provided by the third embodiment of the present invention is an apparatus that applies the cross-carrier scheduling method provided by the foregoing first embodiment and the cross-carrier scheduling method provided by the second embodiment. All embodiments are applicable to the cross-carrier scheduling apparatus, and all can achieve the same or similar beneficial effects.

Fourth embodiment

In order to better achieve the foregoing objective, as shown in FIG. 11, a fourth embodiment of the present invention further provides a cross-carrier scheduling apparatus. The cross-carrier scheduling apparatus includes: a processor 1100; and a processor 1100 through a bus interface. A connected memory 1120 and a transceiver 1110 connected to the processor 1100 through a bus interface; the memory is used to store programs and data used by the processor when performing operations; the transceiver 1110 is used to Receiving the cross-carrier scheduling instruction sent by the base station under the first carrier; the processor 1100 determines the cross-carrier scheduling time indicated by the base station according to the cross-carrier scheduling instruction; the processor 1100 is further configured to The delay time is increased to obtain the actual cross-carrier scheduling time; the transceiver 1110 is further configured to use the second carrier for communication between user equipments during the actual cross-carrier scheduling time.

Among them, in FIG. 11, the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 1100 and various circuits of the memory represented by the memory 1120 are connected together. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art, and therefore will not be further described herein. The bus interface provides an interface. The transceiver 1110 may be multiple elements, including a transmitter and a receiver, providing a unit for communicating with various other devices over a transmission medium. For different user devices, the user interface 1130 may also be an interface capable of externally connecting and connecting the required devices. The connected devices include, but are not limited to, a keypad, a display, a speaker, a microphone, a joystick, and the like. The processor 1100 is responsible for managing the bus architecture and general processing, and the memory 1120 can store data used by the processor 1100 when performing operations.

It should be noted that the cross-carrier scheduling apparatus provided by the fourth embodiment of the present invention corresponds to the cross-carrier scheduling apparatus provided by the third embodiment, so the cross-carrier scheduling methods provided by the first and second embodiments described above All embodiments are applicable to the cross-carrier scheduling apparatus, and all can achieve the same or similar beneficial effects.

The above is the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and retouches can be made. These improvements and retouches should also It is regarded as the protection scope of the present invention.

Claims (10)

    A cross-carrier scheduling method includes: receiving a cross-carrier scheduling instruction sent by a base station under a first carrier; determining the cross-carrier scheduling time indicated by the base station according to the cross-carrier scheduling instruction; adding a delay to the cross-carrier scheduling time Time to obtain the actual cross-carrier scheduling time; within this actual cross-carrier scheduling time, the second carrier is used for communication between user equipments.         The cross-carrier scheduling method according to claim 1, wherein before the step of adding a delay time to the cross-carrier scheduling time to obtain the actual cross-carrier scheduling time, the method further comprises: transmitting according to the cross-carrier scheduling instruction to be used Sub-frame number and transmission sub-frame structure to obtain the next cross-carrier scheduling time indicated by the base station; determine the value of the delay time according to the time interval between the cross-carrier scheduling time and the next cross-carrier scheduling time .         The cross-carrier scheduling method according to claim 1, wherein the step of receiving a cross-carrier scheduling instruction sent by the base station on the first carrier includes: receiving, on the first carrier, a PDCCH / enhancement through a physical downlink control channel The downlink control information DCI transmitted by the EPDCCH of the physical downlink control channel; obtaining a cross-carrier scheduling indication carried in the DCI, wherein the cross-carrier scheduling indication occupies at least 2 bits in the DCI.         The cross-carrier scheduling method according to claim 3, wherein the step of receiving downlink control information DCI transmitted in the physical downlink control channel PDCCH / enhanced physical downlink control channel EPDCCH under the first carrier includes: The DCI transmitted through the PDCCH / EPDCCH by all downlink sub-frames and special sub-frames received on the carrier.         The cross-carrier scheduling method according to claim 3 or 4, wherein the length of the DCI is based on the sum of the basic information bit length and the preset scheduling bit length under the maximum bandwidth, and the maximum format length under the current bandwidth The length of the basic information bit is equal to the length of the DCI format 5A, the maximum format length is equal to the length of the DCI format 0, and the preset scheduling bit length includes a 3-bit semi-continuous scheduling SPS configuration indication. And 1bit SPS start / release instructions.         A cross-carrier scheduling device includes a transceiver, a processor, and a memory for storing programs or data used by the processor when performing operations. The transceiver is used to receive a base station transmission under a first carrier. The cross-carrier scheduling instruction; the processor is configured to determine the cross-carrier scheduling time indicated by the base station according to the cross-carrier scheduling instruction received by the transceiver, and increase the delay time on the cross-carrier scheduling time to obtain the actual cross-carrier scheduling Scheduling time; the transceiver is further configured to use the second carrier to perform communication between user equipments within the actual cross-carrier scheduling time obtained by the processor.         The cross-carrier scheduling apparatus according to claim 6, wherein the processor is further configured to obtain the following sub-frame number and transmission sub-frame structure used for transmission according to the cross-carrier scheduling instruction transmission, A cross-carrier scheduling time is determined according to a time interval between the cross-carrier scheduling time and the next cross-carrier scheduling time.         The cross-carrier scheduling device according to claim 6, wherein the transceiver is specifically configured to: receive downlink control information DCI transmitted through the physical downlink control channel PDCCH / enhanced physical downlink control channel EPDCCH under the first carrier; obtain The cross-carrier scheduling indication carried in the DCI, wherein the cross-carrier scheduling indication occupies at least 2 bits in the DCI.         The cross-carrier scheduling apparatus according to claim 8, wherein the transceiver is specifically configured to receive the DCI transmitted by all downlink sub-frames and special sub-frames through the PDCCH / EPDCCH under the first carrier.         The cross-carrier scheduling apparatus according to claim 8 or 9, wherein the length of the DCI is based on a sum of a basic information bit length and a preset scheduling bit length under a maximum bandwidth, and a maximum format length under a current bandwidth The length of the basic information bit is equal to the length of the DCI format 5A, the maximum format length is equal to the length of the DCI format 0, and the preset scheduling bit length includes a 3-bit semi-continuous scheduling SPS configuration indication. And 1bit SPS start / release instructions.